js file download

window.open () can only be opened once, only download a plurality of files to download 
function downloads (name, the href) { 
    var a = document.createElement ( "a"), to create a label // 
        e = document.createEvent ( "MouseEvents"); // create a mouse event object 
    e.initEvent ( "click", false, false); // initialize event object 
    a.href = href; // set Download 
    a.download = name; // set download file name 
    a.dispatchEvent (e); // to the specified elements, the event click event 
} 

download create multiple iframe idea of multiple files, and can not be deleted right away

sites = var [ 'URL', 'URL2'] 
for (the let I = 0; I <sites.length; I ++) { 
    const iframes = document.createElement ( "iframes"); 
    iframe.style.display = "none"; 
    = 0 iframe.style.height; 
    // url themselves designated 
    iframe.src = sites [i]; 
    document.body.appendChild (iframe); 
    // iframe can not immediately be deleted, whether the person will be immediately canceled case appears 
    the setTimeout (() => { 
        iframe.remove (); 
    }, 3000); 
}